bug#72018: 30.0.60; [PATCH] Don't emit a prompt when a background Eshell process is killed

[Jim Porter]

Steps to reproduce:

  emacs -Q -f eshell
  $ sleep 100 &
  $ kill -9 <sleep's process id>

After this, you'll see two Eshell prompts get emitted (one with a "[9]" 
for the exit status of "sleep"). We don't want to emit prompts when 
background processes die though.

This is a regression from Emacs 29, likely due to some changes I made to 
improve support for complex background commands. Eli, is this ok to 
merge to the release branch?

0001-Don-t-emit-a-prompt-in-Eshell-when-a-background-comm.patch
Description: Text document